Space

3. The explosion of a star at the end of its life cycle, resulting in a dramatic increase in brightness followed by a gradual fading.
4. Unit of measurement of vast distances in space, approximately equal to 9.46 trillion kilometers. (2 words)
9. The boundary surrounding a black hole beyond which no information or matter can escape. (2 words)
10. A stream of charged particles released from the upper atmosphere of the Sun, influencing the space environment throughout the solar system. (2 words)
12. A form of matter that does not emit, absorb, or reflect light, making it invisible. It is thought to make up about 27% of the universe’s mass and energy. (2 words)
14. The scientific study of celestial objects such as stars, planets, comets, and galaxies, and phenomena that originate outside Earth's atmosphere.

1. A cloud of gas and dust in space, often acting as the birthplace of stars. Some nebulae are the remnants of dying stars.
2. A theoretical passage through space-time that could create shortcuts for long journeys across the universe.
5. A planet that orbits a star outside our solar system.
6. A region of the solar system beyond Neptune that contains small bodies, remnants from the solar system’s formation, including dwarf planets like Pluto. (2 words)
7. The stretching of light to longer wavelengths due to the expansion of the universe or an object moving away from the observer.
8. The path an object takes as it moves around another object due to gravity.
11. A large system of stars, gas, dust, and dark matter bound together by gravity.
13. An extremely bright and distant object believed to be powered by a supermassive black hole at the center of a galaxy.